add older PHP5's since pear/composer allow back to 5.4

.github/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
       fail-fast: false
       matrix:
         operating-system: [ ubuntu-latest ]
-        php: [ '5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1' ]
+        php: [ '5.4', '5.5', '5.6', '7.0', '7.1', '7.2', '7.3', '7.4', '8.0', '8.1' ]
         dependencies: [ 'locked' ]
 
     name: PHP ${{ matrix.php }} on ${{ matrix.operating-system }} with ${{ matrix.dependencies }} dependencies
@@ -31,7 +31,9 @@ jobs:
 
       - name: Install PEAR
         run: |
+          sudo apt-get --fix-broken install
           sudo apt-get install php-pear
+          pear list
 
       - name: Run tests
         run: |

composer.json

@@ -23,7 +23,7 @@
         }
     ],
     "require": {
-        "php": ">=5.2.0",
+        "php": ">=5.4.0",
         "pear/pear-core-minimal": "^1.10.0alpha2"
     },
     "suggest": {

package.xml

@@ -71,10 +71,10 @@ Also Lzma2 compressed archives are supported with xz extension.</description>
  <dependencies>
   <required>
    <php>
-    <min>5.2.0</min>
+    <min>5.4.0</min>
    </php>
    <pearinstaller>
-    <min>1.9.0</min>
+    <min>1.10.0</min>
    </pearinstaller>
   </required>
  </dependencies>

tests/setup.php.inc

@@ -1,5 +1,7 @@
 <?php
 error_reporting(E_ALL);
+// adjust include_path for PHP pre-5.6 behavior
+set_include_path(get_include_path() . PATH_SEPARATOR . '/usr/local/php/' . PHP_MAJOR_VERSION . '.' . PHP_MINOR_VERSION . '/share/pear');
 require_once dirname(__FILE__) . '/phpt_test.php.inc';
 $phpunit = new PEAR_PHPTest(true);
 require_once dirname(dirname(__FILE__)) . '/Archive/Tar.php';